Function: log(cos(gradient[2](numbers('yxr') if numbers('rrr') > numbers("per") else numbers('yxr') if numbers('xyy') > numbers('rrr') else numbers("per"))), gradient[2](numbers('yxr') if numbers('xyy') > numbers('rrr') else numbers("per") if numbers('yxr') > numbers('rrr') else numbers("per")))
